Heel attaching machine



Nov. 4, 1947. J. T. LANcAsTE HEEL ATTACHING MACHINE 4 Sheets-Sheet l Inventor John Tlancaster Filed April 20, 1946 Nov; 4, 1947.

Filed April 20, 1946 4 Sheets-Sheet 2 0 z. 0 r m B. B mm u 4ila $7 nm m 04 "mu m I wm 1% m a m 4 4w mi} ,0 & 56 m \J. 7 7Q V&\ E W Z 4 4 m. 81 6 6 5 5 a T fix 6 3 Nov. 4, 1947.

J. T. LANCASTER ,430,061

HEEL ATTAQHING MACHINE Filed April 20, 1946 4 Sheets-Sheet 5 Ira/en tor 1947. J. T. LANCASTER HEEL ATTACHING MACHINE Filed ApI il 20, 1946 4 Sheets-Sheet 4 ]nventor John TZancaster Patented Nov. 4, 1947 UNITED STATES ?ATENT OFFICE HEEL ATTACHIN G MACHINE Application April 20, 1946, Serial No. 663,653

21 Claims.

This invention relates to fastening inserting machines and is illustrated as embodied in an improved heel attaching machine of the type disclosed in United States Letters Patent No.

2,374,359, granted April 24, 1945, on an application filed in my name.

It is common practice to attach a wood heel to a shoe mounted upon a last, by a screw which, after the heel has been clamped to the shoe, is driven, by a driver movable through a passage in the cone of the last, through the heel-seat portion of the shoe and into the heel, said screw being relied upon to hold the heel in its clamped position on the shoe while various finishing operations are performed on the shoe and until said heel is further secured to the shoe, after the last has been pulled, by inside nailing.

In attaching heels to shoes in accordance with the above practice, considerable difficulty has been experienced in driving screws to the proper depth into the heel-seat portions of the shoes, and it is an object of the present invention to provide an improved machine by the use of which heels may be quickly and eifectively attached to shoes by screws and which is responsive to varying conditions in heel-seat construction so that the screws will be driven automatioally to the proper depth into the heel-seat portions of said shoes in accordance with said varying conditions.

With the above object in view and in accordance with a feature of the present invention, there are provided in a heel attaching machine, a reciprocalole and rotatable fastening or screw inserting driver, mechanism for rotating the driver, and means constructed and arranged to be forced against the heel-seat portion of an insole of a shoe to which a heel is clamped, portions of said mechanism being responsive to engagement with said means for rendering said mechanism inoperative, with the result that the driver ceases to rotate.

In the illustrative machine, the shoe, which is mounted upon a last resting upon a support, is firmly held in position to be operated upon by a clamp which forces a heel against the heelseat portion of the shoe and the last against said support, a passage extending heightwise through the cone of the last being in register with an opening in the support. The work engaging means is illustrated as a tube mounted for movement through said passage in the last into forced engagement with the insole of the shoe. Slidingly mounted in the tube is a screw driver which is yieldingly reciprocated together with a continuously rotating driving spindle. Formed integral with the spindle is a driving portion of a clutch, said clutch having a driven portion secured for rotation with, but slidable to a slight extent lengthwise in, the screw driver. The driven portion of the clutch is constantly urged by springs toward one limit of its slidable movement in the driver, into engaged or driving relation with the driving portion of the clutch, in order that rotation of the spindle shall effect corresponding rotation of the driver.

The spindle is yieldingly connected for reciprocation with and with relation to the work engaging tube into which the operating end of the driver is initially drawn to provide a recess for receiving a screw, said tube serving as a guide for thescrew as itis moved toward and is being driven into the work.

As the continuously rotating and yieldingly slidable spindle is moved toward the shoe, it imparts corresponding sliding movement and, through the clutch, corresponding rotation, to the driver, and also causes corresponding sliding movement of the tube. When the tube, after being moved through the passage in the last, has been forced with considerable pressure against the heel-seat portion of the shoe, it comes to rest, continued sliding movement of the spindle and the driver toward the shoe causing the screw to be driven through the heel-seat portion of the shoe and into the heel. As the driver moves toward the heel-seat portion of the shoe, the driven portion of the clutch engages the tube which is at such time in forced engagement with the heel-seat portion of the shoe, causing said driven portion of the clutch to become disengaged from the driving portion of the clutch and accordingly rotation of the driver to cease. The driver operating spindle is moved toward the shoe by mechanism including a spring, the stopping of rotation of the driver causing movement of the driver toward the shoe to be resisted with sufficient force to compress the spring, with the result that the driver comes to rest temporarily.

In order to insure against further driving of the screw into the work and/or splintering the head of the screw during the retraction of the driver, there is provided, in accordance with another feature of the invention, a latch adapted to retain the driving and driven portions of the clutch disengaged during at least the first part of the retractive movement of the driver. The illustrative latch is provided with an extension which, during the last part of the retractive movement of the driver, is engaged by an abutment, causing the latch to be tripped and the driving and driven portions of the clutch to become engaged, with the result that the driver is again rotated in response to rotation of the spindle.

In the event that there are one or more voids between the various parts constituting the heelseat portion of the shoe, or that said heel-seat portion is not forced into snug engagement with the cup of the heel, said voids will be closed and/or said heel-seat portion forced against the cup of the heel by pressure exerted against the insole of the shoe by the tube, with the result that the position of the tube at the time it causes disengagement of the clutch, and accordingly the depth to which the screw is driven into the work, will vary in accordance with the heel-seat construction of the shoe.

When for any reasonv the screws are not being driven to the. proper depth into the shoes by the machine, it is desirable to adjust the machine to correct this condition and, in accordance with another feature of the invention, the tube comprises two parts, one of which compresses the work and the other of which is engaged by the clutch, the parts being relatively adjustable to vary the depth of penetration of a screw driven into the work.

The above and various other features of the invention will be understood and appreciated from the following detailed description read in connection with the accompanying drawings, in which Figs. 1 and 2 are side views, partly broken away and partly in section, showing portions of drilling and screw inserting mechanism respectively of the illustrative machine and an assembled shoe and heel presented thereto;

Fig. 3 is an enlarged view showing in side elevation a portion of the screw inserting mechanism illustrated in Fig. 2 and an assembled shoe and heel, partly broken away and partly in section, about to be operated upon;

Fig. 4 is a view similar to Fig. 3 showing the heel-seat portion of the shoe compressed and forced against the cup of the heel by a tube associated with said screw inserting mechanism, prior to driving a screw guided by said tube into the work;

Fig. 5 is a side elevation similar in part to Fig. 4 after the screw has been driven into the work, a clutch through which a screw driver of said mechanism is rotated being shown disengaged;

Fig. 6 is a vertical section illustrating operative connection between a continuously rotating driving spindle and the tube on the one hand and between said driving spindle and the screw driver on the other hand, the clutch being shown engaged;

Fig. '7 is a section on line VIIVII of Fig. 6;

Fig. 8 is a view similar to Fig. 6 showing the clutch disengaged;

Fig. 9 is a section on line IX-IX of Fig. 8;

Fig. 10 is an exploded view showing in detail various parts of the screw inserting mechanism; and

Fig. 11 is a view showing operative connections between the driving spindle and a power shaft.

The illustrative machine will be described with reference to driving a screw (Figs. 2, 4 and 5) through the heel-seat portion 22 (Figs. 1 to 5) of a shoe 24, which is mounted upon a last 28, and into a wood heel 26 clamped to the shoe, in order to attach said heel to the shoe. The screw 20 serves to hold the wood heel 26 in its clamped position on the shoe 24 while various finishing operations are performed on the shoe, after which the last is pulled and the heel is further secured to the shoe by nails driven from the inside of the shoe. Since the illustrative screw inserting unit of the present invention will be described as forming part of the above-mentioned machine disclosed in United States Letters Patent No. 2,374,359, only such parts of said machine as are essential in disclosing the present invention will be described in detail herein.

In the illustrative embodiment of the invention, the assembled shoe 24 and the heel 25 are positioned upon a shoe support 30 having extending from it a bracket 32 upon which are mounted clamps 34 operated by suitable mechanism, not shown herein but illustrated in detail in said Letters Patent, for forcing the heel against the heel-seat portion 22 of the shoe and the cone of the last 28 against the support. The shoe 24 is fixedly positioned upon the support 30 at a drilling station 36 (Fig. 1), an opening or hole 38 (Figs. 1 to 5) in the support at that time being in register with holes 49 (Fig. 1), d2 formed in the machine frame 44 and in a. rectilinear guide 46 secured by screws 48 to said frame. Extending upward through the holes 40, G2 and 38 is a sleeve 50 (Fig. 1) upon which the shoe 24 is positioned with a cylindrical passage 52 of the. last 28' in engagement with the sleeve, the upper end of the sleeve engaging an insole 54 (Figs. 1 to 5) of the shoe mounted upon the last.

The shoe is normally placed upon the sleeve 50 and is manually depressed until the cone of the last 28 engages the support 30, the sleeve being depressed with the shoe and, through mechanism disclosed in said Letters Patent, actuating a mask (not shown), the position of which controls the amount of upward movement of a drill spindle 53 (Fig. l), and also actuating a mask (not shown), the position of which controls the amount of upward movement of a screw driver 55 (Figs. 2 to 6, 8 and 10). Through suitable mechanism not illustrated herein the drill spindle 53, together with a drill 56 (Fig. l) secured to it, is raised different heights from a constant starting position, in accordance with the heights of the lasts 28 measured by the sleeve 50 and its associated mechanism, to drill a hole 58 (Figs. 2, 3 and 4) extending through the heel-seat portion 22 of the shoe 24 and into the heel 26, the depth of the hole in the work always being constant. When the drilling mechanism and the last height measuring sleeve 53 have been lowered below the upper face of the rectilinear guide 45 upon which the support 30 is slidingly mounted, the shoe clamped to the support with the passage 52 of its associated last 28 in register with the hole 33 of the support is moved along said guide 46 to a screw inserting station 60 (Figs. 2 to 5) in which said hole 38 is in alinement with holes 62, E4 in the guide 46 and the machine frame 44 respectively The illustrative screw inserting unit of the present invention comprises a hollow tube 66 (Figs. 2 to 6, 8 and 10) which fits slidingly in the holes 62, in the guide 45 and the machine frame M and is threaded into a split collar 68, a binding screw it! (Figs. 2, 5 and 10) being provided for fixedly securing the collar to the tube. The tube 55 and the collar E8 may be considered as a unit, serving as a work engaging or compressing member or tube the purpose of which will appear later. The tube 66, for the purpose of varying the depth of penetration of the screw, as will appear later, may also be considered as a multipart unit comprising the work compressing tube proper and the collar 58 which serves as a clutch disengaging abutment. Slidably mounted for movement in a bore I2 (Figs. 5, 6, 8 and 10) of the collar 68 is a threaded rod I4 the lower end of which is pinned to a lug I5 forming part of a split coupling F8 opposite halves of which are secured together by screws 80 (Figs. 5 and 10). The coupling I8 fits in a circumferential channel 82 (Figs. 6, 8 and 10) of a circular rack-toothed or driving spindle or actuator 84 and has an inwardly extending flange 85 (Figs. 6, 8 and 10) fitting in a circumferential recess 88 of a cylindrical boss 95 at the lower end portion of the screw driver 55, which may also be referred to as a driven spindle. Threaded onto the upper end of the rod I4 and normally in engagement with thecollar 58 is a wing nut 92, and coiled about the rod is a spring 94 opposite ends of which are in engagement with the collar 68 and the lug "I5, respectively. With the above construction it will be clear that vertical movement or reciprocation of the circular rack-toothed spindle 84 in a guideway 85 (Figs. 2 and 6) of the machine frame 44 will effect corresponding vertical movement of the couplin I8 and the screw driver 55.

Formed integral with the upper end of the driving spindle 84 are a pair of teeth 96 (Figs. 7 and 10) normally engaged by pins 98 which are threaded into a sleeve I vertically slidable upon the cylindrical boss '90 of the screw driver 55 and which extend through vertical slots I02 in said boss. The sleeve I00 is constantly urged upward with relation to the cylindrical boss 90, causing the pins 98 to engage the upper ends of the slots I02 and accordingly to be engaged by the teeth 96, by leaf springs I04 which are secured to the coupling I8 and have their upper ends in engagement with the bottom of the sleeve. When the pins 98 are engaged by the teeth 96, it will be apparent that counterclockwise rotation of the driving spindle 84, as viewed from above, will effect a corresponding rotation of the screw driver 55. In order that the driving spindle 84 may be continuously rotated, it has splined to it a helical gear I08 (Fig. 2) meshing with a helical gear I01 secured to a shaft I08 which is operatively connected to an electric motor I09.

The driving spindle 84 is vertically reciprocated by a lifting gear [I0 (Figs. 2 and 11) which is rotatably mounted upon a sleeve I I2 and is operatively connected to said sleeve by a coil spring IE4, one end of the spring being fastened to the lifting gear and the other end of the spring being fastened to the sleeve. The sleeve H2 is pinned to a drive shaft H corresponding to a screw driver lifting shaft 340 which is disclosed in said Letters Patent No. 2,374,359 and has a constant starting position and a stroke varying in extent in accordance with the heightwise dimension of the cone of the last 28 upon which the shoe 24 being operated upon is mounted.

Before clamping the assembled shoe and heel in the machine, the screw 20 is dropped head down through a hole (not shown) extending through the support 30 and into the upper end of the tube 66, which at such time is positioned just below the upper face of the guide 46, the driven spindle or driver 55 usually being so positioned that when the machine is at rest the upper end of the screw on the driver is arranged approximately in the plane of the upper end of said tube. After the assembled shoe and heel have been moved to the screw inserting station 60 as illustrated in Fig. 3, the driving spindle 84 is raised, causing the tube 86 and the screw driver 55 to be raised the same amount, the pins 98 carried by the sleeve I00 being held by the leaf springs I04 in their upward positions with relation to the driving spindle 84 against the upper ends of the slots I02 in driving engagement with the teeth 96 of the driven spindle, to cause rotation of the screw driver.

After the tube 55 has moved upward through the passage 52 in the last 28 into engagement with the insole 54 which forms part of the heelseat portio 22 of the shoe 24, further upward movement of the driving spindle 84 causes compression of the spring 94, the driving spindle and the screw driver 55 continuing their upward advancing movement to drive the screw through the heel-seat portion 22 of the shoe and into the heel 26 in order securely to attach the heel to the shoe.

In order effectively to attach the heel 26 to the shoe 24, the different layers of material forming the heel-seat portion 22 of the shoe should be well compressed together and said heel-seat portion should be effectively forced against a cup I20 (Figs. 3, 4 and 5) of the heel. Since it frequently happens that there are voids I22 (Fig. 3) between the layers of material forming the heel-seat portion 22 of the shoe 24 and/or between said heelseat portion and the cup I20 of the heel 25, the screw 20, in order effectively to attach the heel to the shoe, has to compress the material of said heel-seat portion and/or force the heel-seat portion against the cup to eliminate said voids. Accordingly, in the manufacture of shoes the screw 20 if driven to the desired depth is not always driven flush with the general plane of the heel end of the insole 54, since it is necessary frequently to compress the spaced portions of layers of said heel-seat material together and/or to force the heel-seat portion 22 of the shoe 24 spaced from the cup I20 of the heel ZGagainst said cup. Such a procedure results in forming a slight concavity I24 (Fig. 5) in the inner face of the insole 54 where the head of the screw has pulled it in, but such recess is not large enough to be objectionable. It will be apparent from the foregoing that the amount the heel-seat portion 22 has to be compressed or forced as an entirety against the cup I20 of the heel, in order to provide a solid heel-seat portion, will vary in different shoes. Accordingly, the screws must be driven different depths into the work in accordance with the construction of said heel-seat por-- tion and therefore the heads of the screws should be driven different distances below the general plane of the heel end of the inner face of the insole 54 of the shoe.

When the tube 66 is forced with considerable pressure against the insolve 54 of the shoe 24, the voids I22 between the layers of material of the heel-seat portion 22 of the shoe and between the cup I20 of the heel and said heel-seat portion will be closed, as shown in Fig. 4, a slight concavity being formed where the tube is pressed against the inner face of said insole. Moreover, even when there are no voids I22 present, should the insole 54 and/or the other layers of the heelseat parts of the shoe be made of soft material, the tube 06 in compressing the heel-seat material against the cup of the heel will form a slight concavity in the inner face of the insole.

As the tube 66 compresses the heel-seat portion 22 of the shoe 24 as above described, the driving spindle 84 and the screw driver 55 are raised as a unit to insert the screw 20 into the work. When the sleeve Hill of: the clutch engages the split collar 68 of the work. engaging tube 65, upward movement or said sleeve, and accordingly the pins 98 carried by the sleeve, ceases, continued upward movement of. the driving spindle '84 causmg a circumferential groove I25 (Figs. '6, 8, 9 and 10) in the driving spindle to be brought into register with. the pins and, consequently, rotation of the driver to cease. The teeth 96 maybe referred to as the driving portion of'the-clutch and the pins '88 and the sleeve ['00 collectively may be referred to as the driven portion of the clutch. It willbe noted that the extent of upward move-' ment of the screw driver 55 and accordingly thedepth to which the screw 20 is driven into the workdepends upon the heightwiseposition of the work-engagingtube 6%, it being understood that the driver will rotate a constant number of turns between the time the sleeve I first engages the tube and the time the teeth 96 are moved out of driving engagement with the pins 98.

The machine disclosed in Patent No. 2,374,359 is 'designed' for use with screws having a steep pitch, whereas the machine illustrated herein is designed for use with screws 28 which have a low pitch. The speed of rotation of the driving spindle84 is suchthat the screw 20-, due to its rotation bythe. driver 55, enters the work at a speed slightly less than the constant upward speed of the driver, the: spring H4, through which the driving spindle 84 is raised, yielding as the screw resists said upward movement, When the rotation of the screw driver 55- ceases, upward movement of the driving spindle 84 also ceases, the spring HE secured to the drive shaft H6 being further compressed.

When. the drive. shaft I I6, through which the driver is reciprocated, reverses its movement, said driver will be held momentarily in engagement with the screw 28 until the spring. H4 is unwound: sufiiciently to drive the gear HI] in a reverse direction. As the screw driver55 is lowered, the leaf springs HM, unless prevented by mechanism which will be described, will momentarily hold the sleeve I00 against the collar 68 of the tube 56, with the result that the teeth 96 at the upper end of the driving spindle B iwill' be brought into engagement with the pins 88 carried by the sleeve, thereby starting rotation of the driver before said driver has moved out. of adriving slot of the screw. Such rotation of the screw 20 would cause it to be moved further into the work and sometimes causes the -splin-- tering-of the head of the screw in the vicinity of the slot. In order to insure that the screw 211 shall be driven in the work only during the tip-- ward movement of the driver 55-, the clutch, after being disengaged, is locked in said disengaged position, as best shown in Figs. 5- and '8', until the driver has moved back almost to its retracted position, by a latch ['28 which is pivoted upon pins t3if secured to the coupling 18-, a hook portion of the latch I28 being constantly urged toward the sleeve I 00 by a sprin r32 (Figs; 2, 5 and 19) In initially setting up the machine, the collar 68 is secured in its adjusted position on the tube 66 toinsure that screws are driven to the proper depth into the work. Whenever it is found that screws are being inserted too deep or not deep: enoughinto the work, the adjustment of the collar 68 on the tube 69 may be quickly efiected.

When the driving: spindle 84% is in it lowered position'an dfilsetarm [M of the latch 128 is in engagement with a face Hi6 (Figs. 2, 6 andi0)- 8, of the machine frame 44, the hook portion of the latch. being swung slightly away from the sleeve 150-. As the: driving spindle 84, together with the coupling 18-, is raised, the hook portion of the latch L28 is moved into engagement with the side of the sleeve Hill by the sprin I32 and when said sleeve has engaged the collar 68 of the tube 66 and the pins 98 carried by the sleeve have been brought into register with the circumferential groove l26, the hook portion of the latch I28 overrides the upper face of the sleeve and remains there until the driving spindle 84 has been moved approximately to its retracted position, in which position the latch is swung away from the sleeve by engagement of the offset arm I34 of the latch with the face I 36 of the machine frame 44 to permit the clutch to be engaged and accordingly-the screw driver 55 again to be rotated.

Although the illustrative screw inserting unit has been. described as embodied in the machine disclosed in said Letters Patent No. 2,374,359, it will be understood that such unit can, if desirable, be use-d'separately.

Having described my invention, what I claim as new and desire to. secure by Letters Patent of the United States is:

1. In a heel attaching machine, means constructed and arranged to be forced against the heel-seat portion of an insole of a shoe to which a heel is clamped, a rotatable driver reciprocable with relation to said means, and mechanism responsive to engagement with said means for causing rotation ofthe: driver to cease.

'2. In :a heel attaching machine, a reciprocable and rotatable. fastening inserting driver, mechanism for rotating the driver, and mean constructed and arranged to be forced against the heei-seat portion of an insole of a shoe to which aheel is clamped, portions of said mechanism being. responsive to engagement with said means tor rendering said mechanism inoperative, to cause rotation of the driver to cease.

3'. In a. heel attaching machine, means constructed and arranged to be forced against the heel-seatportion of an insole of a shoe to which a heel is clamped, a rotatable driver reci-procable togetherwith and with relation to said means, and mechanismnrovabl'e with said driver and responsive to engagement with said means for causing rotation of the driver to cease.

4.111 a heel attaching machine, a work support, a. screw driver, means for yieldingly reciprocating the driver, means for rotating the driver, and a work compressing member movable into different operative positions, said driver rotating: means being responsive to engagement with said member for causing rotation of the driver to cease;

"5. In a heel attaching machine, a work" support, a reciproca'b'le screw driver, means for yieldingly advancing said driver, means for rotating the driver, and means comprising a work compressing member and an abutment which is operatively connected to said member, said driver rotating means being responsive to engagement with said abutment to cause rotation of the driver to cease, said member and said abutment bein'g? reiatively adjustable to vary the depth of peneration of av screw driven by the driver 7 it into the work.

9 engagement with said unit to cause rotation of the driver to cease, said unit comprising parts constructed and arranged for relative adjustment to vary the depth of penetration of a screw driven by the driver into the work.

7. In a heel attaching machine, a support, a reciprocable screw driver, yieldable means for advancing said driver, means for rotating the driver, a multipart unit yieldingly reciprocable with the driver, said unit comprising two parts one of which is constructed and arranged to engage the heel-seat portion of a shoe mounted upon the support and the other of which is constructed and arranged to be engaged by the driver rotating means for causing rotation of the driver to cease, and means for relatively adjusting said parts of the unit generally lengthwise of the path of reciprocation of said driver to vary the depth of penetration of a screw driven by the driver into said heel-seat portion.

8. In a heel attaching machine, a work support, a rotary screw driver, a screw guiding and work engaging member, means for reciprocating the screw driver together with and relatively to said member, and mechanism comprising a clutch for rotating the screw driver, said clutch being constructed and arranged to engage said member during the screw inserting stroke of the driver,

thereby causing said clutch to be disengaged and,-

consequently, rotation of the driver to cease.

9. In a heel attaching machine, a work support, a screw driver, yieldable means for reciprocating said driver, means for rotating the driver, a work engaging member reciprocable together with and relatively to the driver, said drive rotating means being actuable in response to engagement with said member for causing rotation and accordingly screw inserting movement of the driver to cease, and a latch for insuring against rotation of the driver when said driver rotating means is out of engagement with said member during retraction ofthe driver.

10. In a fastening inserting machine, a reciprocable screw driver, a clutch reciprocable with the driver and constructed and arranged to impart rotation to the driver, a work engaging member, means for advancing said driver and said member together as a unit until the member engages the work and for thereafter advancing the driver with relation to said member, said clutch during its advancement with the driver being disengaged by said member in engagement with the work to cause rotation of the driver to cease, mechanism for retaining the clutch disengaged during movement of the screw driver back to a retracted position, and means for operating said mechanism just before the screw driver arrives at its retracted position to permit the clutch again to become engaged.

11. In a fastening inserting machine, a work support, a screw driver, a reciprocable member, means for coupling said member to said screw driver to cause reciprocation of said member to effect corresponding reciprocation of the driver, means for rotating said member, a clutch which when engaged operatively connects the screw driver for rotation with the member and which when disengaged ceases to rotate the screw driver in response to rotation of said member, and a work engaging member constructed and arranged to actuate the clutch at a predetermined stage of the advancement of the screw driver to disengage the clutch, thereby causing rotation of the screw driver to cease.

12. In a fastening inserting machine, a rotatable fastening inserting driver reciprocable in a predetermined path, means comprising a'clutch for rotating said driver, and a member movable lengthwise of said path into engagement with a work piece, said clutch being constructed and arranged for actuation in response to engagement with said member to cause disengagement of the clutch and, consequently, rotation of the driver to cease.

1 In a fastening inserting machine, a rotatable screw driver, means for yieldingly reciprocating the screw driver in a predetermined path, means comprising a clutch for rotating said screw driver, and a member movable lengthwise of said path into engagement with a work piece, said clutch being constructed and arranged for actuation at a predetermined part of said path in accordance with the position of said member to cause disengagement'of the clutch and, consequently, rotation of the screw driver to cease.

14. In a heel attaching machine, means for supporting a shoe mounted upon a last and for clamping a heel against the heel-seat portion of said shoe, a tube movable through a passage in the last into engagement with an insole of said shoe, a screw driver, a driving spindle, means for rotating and reciprocating said spindle, coupling means for causing reciprocation of the spindle to effect corresponding reciprocation of the driver, a clutch which when engaged effects rotation of the driver i response to rotation of the spindle and which when disengaged causes rotation of the screw driver to cease, and means for yieldingly connecting said spindle to said tube, said tube being constructed and arranged to be engaged by the clutch to cause disengagement of said clutch and, consequently, rotation of the screw driver to cease. I

15. In a heel attaching machine, means constructed and arranged to be forced against the heel-seat portion of an insole of a shoe to which a heel is clamped, a rotatable driver mounted for reciprocation, mechanism for yieldingly reciprocating said means together with the driver, and means movable in response to movement of the driver and responsive to engagement'with said means, for causing rotation of the driver to cease.

16. In a heel attaching machine, means constructed and arranged to be forced against the heel-seat portion of an insole of a shoe to which a heel is clamped, a rotatable driver mounted for reciprocation, machanism for yieldingly reciprocating said means together with the driver, means movable in response to movement of the driver and responsive to engagement with said means to cause rotation of the driver to cease, and means for initially adjusting the first-named means into different operative positions with relation to the driver.

17. In a heel attaching machine, a support for a shoe which is mounted upon a last and has a heel clamped to it, a reciprocable and rotatable screw driver, means for rotating the screw driver, a screw guiding tube which is constructed and arranged to receive the driver and a screw and which is movable through a passage in the last into forced engagement with an insole of the shoe, means for wieldingly reciprocating the driver together with and relatively to the tube, and mechanism which is associated with the driver and is responsive to engagement with the tube to cause rotation of the driver to cease.

18. In a fastening inserting machine, a driven fastening inserting spindle mounted for rotation and reciprocation, a driving spindle which is conrotated and is yieldingly reciprocated, a coupling for causing reciprocation of the driving spindleto efiect corresponding reciprocation of the driven spind1e,.a clutch which when engaged causes rotationof thedriven spindle in response to rotation of the driving spindle, means for disengagingsaidiclutch when the drivingspindie. during itsiastening inserting movement in one direction has traveled to a variable but predetermined positionxto cause rotation and, consequently, fastening; inserting movement of said driven spindle. to cease, mechanism for retaining said clutch disengaged when the driven spindle is moved. in an opposite direction away from said means to insure against positive rotation of the driven spindle during its movement in said opposite direction, .and means for releasing said mechanism when the. driven spindle has moved a substantial distance in said opposite direction to permit the clutch again to be. engaged, thereby causing rotation of the driving spindle to effect rotation of the driven spindle.

19. In a heel attaching machine, a screw driver, an actuator, said driver and said actuator being coupled for reciprocation. as a. unit, means for constantly rotating the actuator, a clutch having a driving portion which is rotated in response to rotation of the actuator and having a driven portion which is rotatablewith the screw driver, resilient means for constantly urging the driving and driven portions or the clutchinto engaged driving relation, and a member movable into different positions against an insole of a shoe, said driven portion: of the cutch being operative in response to engagement with: said member as the clutch is moved toward said shoe to cause disengagement of the driving and driven portions of the clutch against the action of said resilient means and, consequently, causing rotation of the driver to cease.

20. Ina heel attaching machine; a screw driver, an actuator, said driver andsaid actuator being coupled for reciprocation as a unit, means :for constantly rotating the actuator, a clutch having a: driving portion which is rotated in response to rotation of the actuator and having a driven portion which is rotatable with the screw driver, resilient means for constantly urging the driving and driven portions of the clutch into engaged drivingrelation, a member movable into difierent positions against an insole of a shoe, said driven portion or the clutch being operative in response to engagement with said member as the clutch is moved toward said shoe to cause disengagement of the driving and driven portions of the clutch against the action of said resilient means and accordingly causing rotation of the driver to cease, and a latch for holding the driving and driven portions of the clutch disengaged during a substantial, portion of retractive movement of the driver and the actuator away from the shoe.

2.1. In a fastening inserting machine, driving and driven spindles coupled for reciprocation as a unit toward and away from a work piece, means for constantly rotating said driving spindle, a clutch having a driving portion which is rotated in response to rotation of the driving spindle, said clutch having a driven portion which is slidable lengthwise of and is rotatable with said driven spindle, resilient means for constantly urging the driving and driven portions of the clutch into engaged driving relation, a member movable into engagement with said Work piece, said driven portionof the clutch being operative in response to engagement with said member in engagement with the work piece to cause disengagement of the driving and driven portions of the clutch and, consequently, rotation of the driven spindle to cease as the spindles are moved toward said work piece, a latch for holding the driving and driven portions of the clutch disengaged during a substantial portion of the retractive movement of said spindles away from said work piece, and mechanism for'tripping said latch to permit the driving and driven portions of the clutch again to become engaged as the spindles are moved further awayfrom saidwork piece.

JOHN T. LANCASTER. 

